Stone is still the king of strength, but if you layer it with a subtle glow—think translucent panels that channel light like old neon but are actually photovoltaic, then you get both durability and a whisper of the future. Keep the arches tight, use stone for the core, and let the retro‑futuristic elements be the accents: metal ribs that look like circuitry, a roof that curves like a saucer, but still shields the walls. The key is to let the stone do the heavy lifting while the tech bits whisper about progress without shouting. That balance keeps the honor alive and the look unmistakably forward.